I know it's been here but all this talk of late...
How difficult is it to remove the rear fender to install the rear fender extender?
Iirc, it can be installed without removing the oem, if you use a dremel to drill the holes. I was going to install one but decided to fab one on my own because I did my trailer hitch, whick makes a perfect frame for my home made version. I do like the way his looks tho, just make sure you use fasteners that allow removal on the road, in case you have to pull the wheel off away from the homefront.